Fan



FIG. 1 is a rear view of an embodiment;

FIG. 2 is a front view of the embodiment of the fan seen in FIG. 1;

FIG. 3 is a side view of the embodiment seen in FIG. 1;

FIG. 4 is a rear perspective view of the embodiment seen in FIG. 1; and,

FIG. 5 is a front perspective view of the embodiment seen in FIG. 1. 

The ornamental design for a fan, as shown and described. 